:root {
  --bg: #F3F5FF; --ink: #0B1033; --muted: #5B6285; --line: #DADFF7; --brand: #0079AD;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #070A1F; --ink: #E9ECFF; --muted: #9AA2D6; --line: #232A5E; --brand: #3CD8FF; color-scheme: dark; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.65 system-ui, -apple-system, "Segoe UI", sans-serif; }
header, main, footer { max-width: 44rem; margin: 0 auto; padding: 0 16px; }
header { padding-top: 28px; padding-bottom: 8px; }
.logo { font-weight: 800; font-size: 1.6rem; letter-spacing: -0.02em; color: var(--ink); text-decoration: none; }
.logo span { color: var(--brand); }
h1 { font-size: 2rem; line-height: 1.2; margin: 1.2rem 0 .25rem; letter-spacing: -0.01em; }
h2 { font-size: 1.2rem; margin: 2rem 0 .5rem; }
.meta { color: var(--muted); margin: 0 0 1.5rem; }
a { color: var(--brand); }
ul { padding-left: 1.2rem; }
li { margin: .25rem 0; }
table { width: 100%; border-collapse: collapse; margin: .5rem 0 1rem; font-size: .95rem; }
th, td { text-align: left; vertical-align: top; padding: .5rem .5rem; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 600; }
.table-wrap { overflow-x: auto; }
.note { background: color-mix(in srgb, var(--brand) 8%, transparent); border-radius: 12px; padding: .75rem 1rem; }
footer { margin-top: 3rem; padding-top: 1rem; padding-bottom: 2rem; border-top: 1px solid var(--line); color: var(--muted); font-size: .9rem; }
footer a { color: var(--muted); margin-right: 1rem; }